2116571011664 has 10 divisors (see below), whose sum is σ = 4100856335130. Its totient is φ = 1058285505824.

The previous prime is 2116571011663. The next prime is 2116571011679. The reversal of 2116571011664 is 4661101756112.

It can be written as a sum of positive squares in only one way, i.e., 1988077440064 + 128493571600 = 1409992^2 + 358460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116571011661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66142844099 + ... + 66142844130.

It is an arithmetic number, because the mean of its divisors is an integer number (410085633513).

Almost surely, 2^{2116571011664} is an apocalyptic number.

It is an amenable number.

2116571011664 is a deficient number, since it is larger than the sum of its proper divisors (1984285323466).

2116571011664 is a wasteful number, since it uses less digits than its factorization.

2116571011664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132285688237 (or 132285688231 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

Adding to 2116571011664 its reverse (4661101756112), we get a palindrome (6777672767776).

The spelling of 2116571011664 in words is "two trillion, one hundred sixteen billion, five hundred seventy-one million, eleven thousand, six hundred sixty-four".